Oil burner



1,513,110 R. HOFFMAN OIL BURNER med May 191920 d lm 74 27 Mullin,

Patented 0st, 28, 12d.

tran

RUDOLPH HOFFMAN, OF KANKAKEE, ILLINOIS, ASSIGNOR TO' SEARS, ROEBUCK AND C0., 0F CHICAGO, ILLINOIS, A CORPORATION OF NEW YORK.

OIL BURNER.

Application filed May 19, 1920. Serial No. 382,524.

To all whom it may concern.'

Be it known that I, RUDOLPH HOFFMAN, a citizen of the United States, residing at Kankakee, in the county of Kankakee and State of Illinois, have invented certain new and useful Improvements in Oil Burners, of which the followingis a speciiication.

The invention relates to oil burners of the type in which a supply of oil is maintained at a predetermined constant level and the burner bowl is moved vertically with reference to said oil level to control the burner flame.

The object of the invention is to provide an improved construction for mounting the kburner for up and down movement, which also constitutes a connection between a` stationary feed pipe and the burner for conducting fuel to the burner bowl.

The object of the invention thus generally stated, together with other advantages which will be apparent from the following description, is attained by the construction and arrangement illustrated in the accompanying drawings' forming part thereof, in which Figure 1 is a fragmentary elevation section through an oil stove embodying my invention. Fig. 2 is a horizontal sectional view taken in the plane of line 2 of Fig. 11 Fig. 3 is a fragmentary front elevational view of the combined supporting and feeding means for the burner.

In the drawings I have illustrated one of a series of burners mounted beneath the top 1' of a stove frame 8. Longitudinally of the frame extends an oil pipe 9 which leads from an oil'well 10 supported, together with a reservoir 11, at one end of the stove. The oil well 10 is constructed in any suitable and well known way so as to maintain a substantially constant level of oil in an annular burner bowl or trough 12 which communicates by means of a connection designated generally 13 with the oil pipe 9.

The connection 13 comprises a tubular stem 14 depending from the burner bowl 12 and connected therewith so askto communicate with the interior of the trough. At its lower end the stem is supported for up and down movement with. reference to a stationary tubular member 15 mounted at the forward end of a pipe 16 extending forwardly in a substantially horizontal direction from the oil pipe 9. The pipe 16 has :af-detachable connection 17 of any' suitable and well known construction with the pipe 9, and at its opposite end the pipe is threaded into the tubular member 15 so as to communicate with the interior thereof.

Between the member 15 and the stem 1-1 is loosely mounted a sleeve 18 made of such length as to extend a substantial distance above and below the member 15 and fixed against movement with reference to the stem 141 as by means of a bushing 19 entered between the sleeve and the stem at their lower ends and in threaded engagement therewith, Surrounding the upper end of the sleeve 18 is a bellows diaphragm 2() consisting of a plurality of sections and having its lower end rigidly secured to the upper end of the tubular member 15 and its upper end rigidly secured to a collar 21 fixed upon the sleeve 18; and surrounding the lower end of the sleeve 18 is a similar bellows diaphragm 22 having its upper end secured to the lower end of the tubular member 15 and its lower end rigidly secured to the sleeve 18 as by means of a plate The stem 14. depends through the plate 23 and its lower end is threaded and provided with a cap 2&1. At the lower end of the stein 11g-1 communication is established between the stem and 'the bellows diaphragm 22 by means of a port 25 formed in the stem, the bushing 19 and the sleeve 18. To assist in supporting the tubular member 15 1 pr'ovide an angular arm 26 having one end rigid with the member 15 and its other end fixed to the stove frame as at 27.

It will be seen that the connection 13 provides a yielding support for the stem 14 permitting 0f the up and down movements of the burner bowl 12 and at the same time forming a connection between the oil supply pipe and the stem 14. Communication between the lower diaphragm 22 and the upper diaphragm 2O is established by means lof a plurality of vertical ports 28 which communicate with each other at their centers by way of an annular groove 29 (Fig. 2).

The means forv producing the up and down movements of the burner may be of any preferred character. Herein it comprises a hand lever 30 pivoted at 30a upon a bracket 301 carried by thepipe 16. InV its central ortion the lever is bifurcated into annular lormation (Fig. 2) so as to surround the bellows diaphragms, and upon opposite sides of the central portion of the lever are pivoted depending arms 31 pivotally connected at their lower ends to laterally extending rods 32 carried by the plate 23 at the lower end of the sleeve 18. TFor the purpose ot maintaining the burner in any desired position with reference to the constant oil level, an arcuate member 38 may be provided adapted to trictionally engage the opposite side of the lever 30 as shown in Fig. 2. Said member 83 may be suitably mounted in the stove trame as, by being supported. at its lower end upon the longitudinal bar 341.

ln the operation et the burner, the bellows diaphragms 2O and 22, together with -3 the stem 14e, become iilled with oil, communication between the two diaphragms being established by the ports 28, and communication betweenY the lower diaphragm and the stem la being established by the port 25. lf it is desired to lower the burner bowl 12 with reference to the constant oil level, the operating handle 8O is depressed and the stem 14 and sleeve 18 are correspondinoly lowered while the annular member l remains stationary. rllhe result is that the upper bellows diaphragm 2O is compressed and a portion of the fuel therein forced through the ports 28 into the lower diaphragm 22 which is expanded. Conversely, when it is desired to raise the burner bowl l2, the lower diaphragm is compressed and the upper diaphragm expanded, the excess liquid in the lower diaphragm passing from the lower diaphragm to the upper diaphragm through the ports 28. 1t will thus be seen that the diaphragins and 22, by reason of the tact that they are reversely actuated in the Operation of raising and lowering the burner, function as equalizers, one .tor the other. Accordingly, the burner may be raised and lowered without materially att'ecting the level ot the oil as would be the case it only one set oi'f diaphragms were employed. The result is that a yielding support is provided for the burner which at the same time forms an absolutely tight connection between the stationary supply pipe 16 and the movable stem A.

1t is to be understood that while the invention is illustrated and described with considerable particularity, it is contemplated that vari as changes may be made in construction ant. arrangement without departing from the spirit and scope of the invention as expressed in the following claims.

1 claim as my invention 1. 1n oil stove, the combination with a supply pipe and a burner bowl, a tubular stem depending from the bowl, a sleeve surrounding saidstem, a tubular member surrounding` said sleeve, two sets'or" bellows diaphragme connecting` said tubular member with the opposite ends ot said sleeve, one of said diaphragms being in communication with said stemand both of said diaphragms being in communication with each other, and means 'for raising and lowering the burner.

2. The combination with an oil supply pipe, a burner, a tubular stem depending from the burner, Va tubular member communicating with the supply pipe and apair ot' cxpansible and contractible members communicating with each other and with the tubular member, one ot' said pair of members communicating with the tubular stem, and means for raising and lowering the burner, said pair of members being adapted to operate reversely so as to provide equalizers, the one for the other.

8. 1n an oil stove, a burner, a source of oil supply, means tor raising and lowering the burner, and a vertically disposed connection between the burner and the source of oil supply including a pair of intercommunicating expansible and contractible elements one ot which is adapted to expand while the other contracts and vice versa in the up and down movements of the burner.

ln an oil burner,l a combined support and conductor comprising a tubular stem depending from the burner, a pair of expansible and contractible elements communicating with each other and with the stem, and means for raisingand lowering said stem, said elements being operatively associated with said stem whereby to operate reversely in the upand down movements of the stem.

5. ln an oil stove, the combination with a supply pipe and a constant-level oil burner having bowl, of a vertically disposed connection between the bowl and supply pipe including an expansible and contractible element, and means for stabilizing the level ot the oil in the bowl in the contraction and expansion of said element.

6. ln an oil stove, the combination with a supply pipe and a constant-level oil burner having a bowl, of avertically disposed connection between the bowl and supply pipe including expansible and contractible means adapted to permit of the up and down movement of the burner and constructed so as to stabilize the level of the oil in such up and down movements of the burner.

7. ln an oil stove, the combination with a supply pipe and a constant-level oil burner having a bowl, of a vertically disposed connection between the bowl and supply pipe including a pair of expansible and contractible elements adapted to permit of the up and down movement of the burner and constructed so as to stabilize the level of the oil in such up and down movements of the burner.

8. 1n an oil stove, the combination of a burner bowl7 a stationary supply pipe, a tubular stem depending from the burner bowl, a member encircling said tubular stem and in communication with the supply pipe, and `flexible means connecting ,Said member with said tubular stem and adapted to support said tubular stem.

9. In an oil stove7 the combination With a stationary source of oil supply and a burner, of means for conducting oil from said source ot supply to the burner While permitting of the up and down movements of the latter including a vertically disposed bellows-diaphragm interposed between said source of supply and the burner.

l0. In an oil stove, the combination with a stationary source of oil supply and a burner,

of means for conducting oil from said source of supply to the burner While permitting of the up and down movements of the latter including a vertically disposed bellows-diaphragm interposed between said source of supply and the burner, and a lever operab-le to raise and lower the burner as permitted by said diaphragm.'

In testimonyT whereof, I have hereunto set my hand.

RUDOLPH HOFFMAN. 

